/* ===================

AX2E (AXESCON XACML 2.0 Engine) is the Java authorization engine, which implements OASIS XACML 2.0 standard.
Copyright (C) 2007 AXESCON LLC

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA


Contact: AXESCON LLC - info{at}axescon.com

 =================== */
package axescon.xacml.engine.fn;

import axescon.xacml.api.AbstractFn;
import axescon.xacml.api.ExpressionEvalIndeterminateException;
import axescon.xacml.api.Fn;
import axescon.xacml.api.Liquid;
import axescon.xacml.model.policy.AttributeValue;
import axescon.xacml.model.shared.attr.BooleanAttribute;

/**
 * @author Date: Sep 28, 2005
 *         Responsibilities: implements Bag functions from
 *         see axescon.xacml 2.0 spec ch. A.3.12 Higher order Bag functions
 */
public abstract class FnHOBagBase2 extends AbstractFn implements Fn, HOBag2Fn {
    public int getArgTypeListLength() {
        return 3;
    }


    public Liquid exec(Liquid[] args) throws
            ExpressionEvalIndeterminateException {
        return new Liquid(new BooleanAttribute(execOnBag1(args[0].getSingularUnsafe().getStringValue(),
                args[1].getBagUnsafe(), args[2].getBagUnsafe())));
    }

    public boolean execOnBag(String arg0, AttributeValue arg1[], AttributeValue[] arg2)
            throws ExpressionEvalIndeterminateException {
        return execOnBag1(arg0, arg1, arg2);
    }

    abstract boolean execOnBag1(String arg0, AttributeValue[] arg1, AttributeValue[] arg2)
            throws ExpressionEvalIndeterminateException;

    public Class getReturnDataType() {
        return BooleanAttribute.class;
    }
}
